1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
4 * and Digital Power Monitor
5 *
6 * Copyright (c) 2011 Ericsson AB.
7 * Copyright (c) 2018 Guenter Roeck
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15 #include <linux/i2c.h>
16 #include <linux/bitops.h>
17 #include <linux/bitfield.h>
18 #include <linux/log2.h>
19 #include "pmbus.h"
20
21 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
22
23 #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
24 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
25 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
26
27 #define ADM1275_PEAK_IOUT 0xd0
28 #define ADM1275_PEAK_VIN 0xd1
29 #define ADM1275_PEAK_VOUT 0xd2
30 #define ADM1275_PMON_CONFIG 0xd4
31
32 #define ADM1275_VIN_VOUT_SELECT BIT(6)
33 #define ADM1275_VRANGE BIT(5)
34 #define ADM1075_IRANGE_50 BIT(4)
35 #define ADM1075_IRANGE_25 BIT(3)
36 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
37
38 #define ADM1272_IRANGE BIT(0)
39
40 #define ADM1278_TEMP1_EN BIT(3)
41 #define ADM1278_VIN_EN BIT(2)
42 #define ADM1278_VOUT_EN BIT(1)
43
44 #define ADM1293_IRANGE_25 0
45 #define ADM1293_IRANGE_50 BIT(6)
46 #define ADM1293_IRANGE_100 BIT(7)
47 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
48 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
49
50 #define ADM1293_VIN_SEL_012 BIT(2)
51 #define ADM1293_VIN_SEL_074 BIT(3)
52 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
53 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
54
55 #define ADM1293_VAUX_EN BIT(1)
56
57 #define ADM1278_PEAK_TEMP 0xd7
58 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
59 #define ADM1275_DEVICE_CONFIG 0xd8
60
61 #define ADM1275_IOUT_WARN2_SELECT BIT(4)
62
63 #define ADM1276_PEAK_PIN 0xda
64 #define ADM1075_READ_VAUX 0xdd
65 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde
66 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
67 #define ADM1293_IOUT_MIN 0xe3
68 #define ADM1293_PIN_MIN 0xe4
69 #define ADM1075_VAUX_STATUS 0xf6
70
71 #define ADM1075_VAUX_OV_WARN BIT(7)
72 #define ADM1075_VAUX_UV_WARN BIT(6)
73
74 #define ADM1275_VI_AVG_SHIFT 0
75 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
76 ADM1275_VI_AVG_SHIFT)
77 #define ADM1275_SAMPLES_AVG_MAX 128
78
79 #define ADM1278_PWR_AVG_SHIFT 11
80 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
81 ADM1278_PWR_AVG_SHIFT)
82 #define ADM1278_VI_AVG_SHIFT 8
83 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
84 ADM1278_VI_AVG_SHIFT)
85
86 struct adm1275_data {
87 int id;
88 bool have_oc_fault;
89 bool have_uc_fault;
90 bool have_vout;
91 bool have_vaux_status;
92 bool have_mfr_vaux_status;
93 bool have_iout_min;
94 bool have_pin_min;
95 bool have_pin_max;
96 bool have_temp_max;
97 bool have_power_sampling;
98 struct pmbus_driver_info info;
99 };
100
101 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
102
103 struct coefficients {
104 s16 m;
105 s16 b;
106 s16 R;
107 };
108
109 static const struct coefficients adm1075_coefficients[] = {
110 [0] = { 27169, 0, -1 }, /* voltage */
111 [1] = { 806, 20475, -1 }, /* current, irange25 */
112 [2] = { 404, 20475, -1 }, /* current, irange50 */
113 [3] = { 8549, 0, -1 }, /* power, irange25 */
114 [4] = { 4279, 0, -1 }, /* power, irange50 */
115 };
116
117 static const struct coefficients adm1272_coefficients[] = {
118 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
119 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
120 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
121 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
122 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
123 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
124 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
125 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
126 [8] = { 42, 31871, -1 }, /* temperature */
127
128 };
129
130 static const struct coefficients adm1275_coefficients[] = {
131 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
132 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
133 [2] = { 807, 20475, -1 }, /* current */
134 };
135
136 static const struct coefficients adm1276_coefficients[] = {
137 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
138 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
139 [2] = { 807, 20475, -1 }, /* current */
140 [3] = { 6043, 0, -2 }, /* power, vrange set */
141 [4] = { 2115, 0, -1 }, /* power, vrange not set */
142 };
143
144 static const struct coefficients adm1278_coefficients[] = {
145 [0] = { 19599, 0, -2 }, /* voltage */
146 [1] = { 800, 20475, -1 }, /* current */
147 [2] = { 6123, 0, -2 }, /* power */
148 [3] = { 42, 31880, -1 }, /* temperature */
149 };
150
151 static const struct coefficients adm1293_coefficients[] = {
152 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
153 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
154 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
155 [3] = { 8000, -100, -2 }, /* current, irange25 */
156 [4] = { 4000, -100, -2 }, /* current, irange50 */
157 [5] = { 20000, -1000, -3 }, /* current, irange100 */
158 [6] = { 10000, -1000, -3 }, /* current, irange200 */
159 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
160 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
161 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
162 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
163 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
164 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
165 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
166 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
167 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
168 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
169 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
170 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
171 };
172
adm1275_read_pmon_config(const struct adm1275_data * data,struct i2c_client * client,bool is_power)173 static int adm1275_read_pmon_config(const struct adm1275_data *data,
174 struct i2c_client *client, bool is_power)
175 {
176 int shift, ret;
177 u16 mask;
178
179 /*
180 * The PMON configuration register is a 16-bit register only on chips
181 * supporting power average sampling. On other chips it is an 8-bit
182 * register.
183 */
184 if (data->have_power_sampling) {
185 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
186 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
187 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
188 } else {
189 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
190 mask = ADM1275_VI_AVG_MASK;
191 shift = ADM1275_VI_AVG_SHIFT;
192 }
193 if (ret < 0)
194 return ret;
195
196 return (ret & mask) >> shift;
197 }
198
adm1275_write_pmon_config(const struct adm1275_data * data,struct i2c_client * client,bool is_power,u16 word)199 static int adm1275_write_pmon_config(const struct adm1275_data *data,
200 struct i2c_client *client,
201 bool is_power, u16 word)
202 {
203 int shift, ret;
204 u16 mask;
205
206 if (data->have_power_sampling) {
207 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
208 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
209 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
210 } else {
211 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
212 mask = ADM1275_VI_AVG_MASK;
213 shift = ADM1275_VI_AVG_SHIFT;
214 }
215 if (ret < 0)
216 return ret;
217
218 word = (ret & ~mask) | ((word << shift) & mask);
219 if (data->have_power_sampling)
220 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
221 word);
222 else
223 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
224 word);
225
226 return ret;
227 }
228
adm1275_read_word_data(struct i2c_client * client,int page,int phase,int reg)229 static int adm1275_read_word_data(struct i2c_client *client, int page,
230 int phase, int reg)
231 {
232 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
233 const struct adm1275_data *data = to_adm1275_data(info);
234 int ret = 0;
235
236 if (page > 0)
237 return -ENXIO;
238
239 switch (reg) {
240 case PMBUS_IOUT_UC_FAULT_LIMIT:
241 if (!data->have_uc_fault)
242 return -ENXIO;
243 ret = pmbus_read_word_data(client, 0, 0xff,
244 ADM1275_IOUT_WARN2_LIMIT);
245 break;
246 case PMBUS_IOUT_OC_FAULT_LIMIT:
247 if (!data->have_oc_fault)
248 return -ENXIO;
249 ret = pmbus_read_word_data(client, 0, 0xff,
250 ADM1275_IOUT_WARN2_LIMIT);
251 break;
252 case PMBUS_VOUT_OV_WARN_LIMIT:
253 if (data->have_vout)
254 return -ENODATA;
255 ret = pmbus_read_word_data(client, 0, 0xff,
256 ADM1075_VAUX_OV_WARN_LIMIT);
257 break;
258 case PMBUS_VOUT_UV_WARN_LIMIT:
259 if (data->have_vout)
260 return -ENODATA;
261 ret = pmbus_read_word_data(client, 0, 0xff,
262 ADM1075_VAUX_UV_WARN_LIMIT);
263 break;
264 case PMBUS_READ_VOUT:
265 if (data->have_vout)
266 return -ENODATA;
267 ret = pmbus_read_word_data(client, 0, 0xff,
268 ADM1075_READ_VAUX);
269 break;
270 case PMBUS_VIRT_READ_IOUT_MIN:
271 if (!data->have_iout_min)
272 return -ENXIO;
273 ret = pmbus_read_word_data(client, 0, 0xff,
274 ADM1293_IOUT_MIN);
275 break;
276 case PMBUS_VIRT_READ_IOUT_MAX:
277 ret = pmbus_read_word_data(client, 0, 0xff,
278 ADM1275_PEAK_IOUT);
279 break;
280 case PMBUS_VIRT_READ_VOUT_MAX:
281 ret = pmbus_read_word_data(client, 0, 0xff,
282 ADM1275_PEAK_VOUT);
283 break;
284 case PMBUS_VIRT_READ_VIN_MAX:
285 ret = pmbus_read_word_data(client, 0, 0xff,
286 ADM1275_PEAK_VIN);
287 break;
288 case PMBUS_VIRT_READ_PIN_MIN:
289 if (!data->have_pin_min)
290 return -ENXIO;
291 ret = pmbus_read_word_data(client, 0, 0xff,
292 ADM1293_PIN_MIN);
293 break;
294 case PMBUS_VIRT_READ_PIN_MAX:
295 if (!data->have_pin_max)
296 return -ENXIO;
297 ret = pmbus_read_word_data(client, 0, 0xff,
298 ADM1276_PEAK_PIN);
299 break;
300 case PMBUS_VIRT_READ_TEMP_MAX:
301 if (!data->have_temp_max)
302 return -ENXIO;
303 ret = pmbus_read_word_data(client, 0, 0xff,
304 ADM1278_PEAK_TEMP);
305 break;
306 case PMBUS_VIRT_RESET_IOUT_HISTORY:
307 case PMBUS_VIRT_RESET_VOUT_HISTORY:
308 case PMBUS_VIRT_RESET_VIN_HISTORY:
309 break;
310 case PMBUS_VIRT_RESET_PIN_HISTORY:
311 if (!data->have_pin_max)
312 return -ENXIO;
313 break;
314 case PMBUS_VIRT_RESET_TEMP_HISTORY:
315 if (!data->have_temp_max)
316 return -ENXIO;
317 break;
318 case PMBUS_VIRT_POWER_SAMPLES:
319 if (!data->have_power_sampling)
320 return -ENXIO;
321 ret = adm1275_read_pmon_config(data, client, true);
322 if (ret < 0)
323 break;
324 ret = BIT(ret);
325 break;
326 case PMBUS_VIRT_IN_SAMPLES:
327 case PMBUS_VIRT_CURR_SAMPLES:
328 ret = adm1275_read_pmon_config(data, client, false);
329 if (ret < 0)
330 break;
331 ret = BIT(ret);
332 break;
333 default:
334 ret = -ENODATA;
335 break;
336 }
337 return ret;
338 }
339
adm1275_write_word_data(struct i2c_client * client,int page,int reg,u16 word)340 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
341 u16 word)
342 {
343 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
344 const struct adm1275_data *data = to_adm1275_data(info);
345 int ret;
346
347 if (page > 0)
348 return -ENXIO;
349
350 switch (reg) {
351 case PMBUS_IOUT_UC_FAULT_LIMIT:
352 case PMBUS_IOUT_OC_FAULT_LIMIT:
353 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
354 word);
355 break;
356 case PMBUS_VIRT_RESET_IOUT_HISTORY:
357 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
358 if (!ret && data->have_iout_min)
359 ret = pmbus_write_word_data(client, 0,
360 ADM1293_IOUT_MIN, 0);
361 break;
362 case PMBUS_VIRT_RESET_VOUT_HISTORY:
363 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
364 break;
365 case PMBUS_VIRT_RESET_VIN_HISTORY:
366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
367 break;
368 case PMBUS_VIRT_RESET_PIN_HISTORY:
369 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
370 if (!ret && data->have_pin_min)
371 ret = pmbus_write_word_data(client, 0,
372 ADM1293_PIN_MIN, 0);
373 break;
374 case PMBUS_VIRT_RESET_TEMP_HISTORY:
375 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
376 break;
377 case PMBUS_VIRT_POWER_SAMPLES:
378 if (!data->have_power_sampling)
379 return -ENXIO;
380 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
381 ret = adm1275_write_pmon_config(data, client, true,
382 ilog2(word));
383 break;
384 case PMBUS_VIRT_IN_SAMPLES:
385 case PMBUS_VIRT_CURR_SAMPLES:
386 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
387 ret = adm1275_write_pmon_config(data, client, false,
388 ilog2(word));
389 break;
390 default:
391 ret = -ENODATA;
392 break;
393 }
394 return ret;
395 }
396
adm1275_read_byte_data(struct i2c_client * client,int page,int reg)397 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
398 {
399 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
400 const struct adm1275_data *data = to_adm1275_data(info);
401 int mfr_status, ret;
402
403 if (page > 0)
404 return -ENXIO;
405
406 switch (reg) {
407 case PMBUS_STATUS_IOUT:
408 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
409 if (ret < 0)
410 break;
411 if (!data->have_oc_fault && !data->have_uc_fault)
412 break;
413 mfr_status = pmbus_read_byte_data(client, page,
414 PMBUS_STATUS_MFR_SPECIFIC);
415 if (mfr_status < 0)
416 return mfr_status;
417 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
418 ret |= data->have_oc_fault ?
419 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
420 }
421 break;
422 case PMBUS_STATUS_VOUT:
423 if (data->have_vout)
424 return -ENODATA;
425 ret = 0;
426 if (data->have_vaux_status) {
427 mfr_status = pmbus_read_byte_data(client, 0,
428 ADM1075_VAUX_STATUS);
429 if (mfr_status < 0)
430 return mfr_status;
431 if (mfr_status & ADM1075_VAUX_OV_WARN)
432 ret |= PB_VOLTAGE_OV_WARNING;
433 if (mfr_status & ADM1075_VAUX_UV_WARN)
434 ret |= PB_VOLTAGE_UV_WARNING;
435 } else if (data->have_mfr_vaux_status) {
436 mfr_status = pmbus_read_byte_data(client, page,
437 PMBUS_STATUS_MFR_SPECIFIC);
438 if (mfr_status < 0)
439 return mfr_status;
440 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
441 ret |= PB_VOLTAGE_OV_WARNING;
442 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
443 ret |= PB_VOLTAGE_UV_WARNING;
444 }
445 break;
446 default:
447 ret = -ENODATA;
448 break;
449 }
450 return ret;
451 }
452
453 static const struct i2c_device_id adm1275_id[] = {
454 { "adm1075", adm1075 },
455 { "adm1272", adm1272 },
456 { "adm1275", adm1275 },
457 { "adm1276", adm1276 },
458 { "adm1278", adm1278 },
459 { "adm1293", adm1293 },
460 { "adm1294", adm1294 },
461 { }
462 };
463 MODULE_DEVICE_TABLE(i2c, adm1275_id);
464
adm1275_probe(struct i2c_client * client)465 static int adm1275_probe(struct i2c_client *client)
466 {
467 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
468 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
469 int config, device_config;
470 int ret;
471 struct pmbus_driver_info *info;
472 struct adm1275_data *data;
473 const struct i2c_device_id *mid;
474 const struct coefficients *coefficients;
475 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
476 int tindex = -1;
477 u32 shunt;
478 u32 avg;
479
480 if (!i2c_check_functionality(client->adapter,
481 I2C_FUNC_SMBUS_READ_BYTE_DATA
482 | I2C_FUNC_SMBUS_BLOCK_DATA))
483 return -ENODEV;
484
485 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
486 if (ret < 0) {
487 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
488 return ret;
489 }
490 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
491 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
492 return -ENODEV;
493 }
494
495 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
496 if (ret < 0) {
497 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
498 return ret;
499 }
500 for (mid = adm1275_id; mid->name[0]; mid++) {
501 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
502 break;
503 }
504 if (!mid->name[0]) {
505 dev_err(&client->dev, "Unsupported device\n");
506 return -ENODEV;
507 }
508
509 if (strcmp(client->name, mid->name) != 0)
510 dev_notice(&client->dev,
511 "Device mismatch: Configured %s, detected %s\n",
512 client->name, mid->name);
513
514 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
515 mid->driver_data == adm1293 || mid->driver_data == adm1294)
516 config_read_fn = i2c_smbus_read_word_data;
517 else
518 config_read_fn = i2c_smbus_read_byte_data;
519 config = config_read_fn(client, ADM1275_PMON_CONFIG);
520 if (config < 0)
521 return config;
522
523 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
524 if (device_config < 0)
525 return device_config;
526
527 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
528 GFP_KERNEL);
529 if (!data)
530 return -ENOMEM;
531
532 if (of_property_read_u32(client->dev.of_node,
533 "shunt-resistor-micro-ohms", &shunt))
534 shunt = 1000; /* 1 mOhm if not set via DT */
535
536 if (shunt == 0)
537 return -EINVAL;
538
539 data->id = mid->driver_data;
540
541 info = &data->info;
542
543 info->pages = 1;
544 info->format[PSC_VOLTAGE_IN] = direct;
545 info->format[PSC_VOLTAGE_OUT] = direct;
546 info->format[PSC_CURRENT_OUT] = direct;
547 info->format[PSC_POWER] = direct;
548 info->format[PSC_TEMPERATURE] = direct;
549 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
550 PMBUS_HAVE_SAMPLES;
551
552 info->read_word_data = adm1275_read_word_data;
553 info->read_byte_data = adm1275_read_byte_data;
554 info->write_word_data = adm1275_write_word_data;
555
556 switch (data->id) {
557 case adm1075:
558 if (device_config & ADM1275_IOUT_WARN2_SELECT)
559 data->have_oc_fault = true;
560 else
561 data->have_uc_fault = true;
562 data->have_pin_max = true;
563 data->have_vaux_status = true;
564
565 coefficients = adm1075_coefficients;
566 vindex = 0;
567 switch (config & ADM1075_IRANGE_MASK) {
568 case ADM1075_IRANGE_25:
569 cindex = 1;
570 pindex = 3;
571 break;
572 case ADM1075_IRANGE_50:
573 cindex = 2;
574 pindex = 4;
575 break;
576 default:
577 dev_err(&client->dev, "Invalid input current range");
578 break;
579 }
580
581 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
582 | PMBUS_HAVE_STATUS_INPUT;
583 if (config & ADM1275_VIN_VOUT_SELECT)
584 info->func[0] |=
585 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
586 break;
587 case adm1272:
588 data->have_vout = true;
589 data->have_pin_max = true;
590 data->have_temp_max = true;
591 data->have_power_sampling = true;
592
593 coefficients = adm1272_coefficients;
594 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
595 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
596 /* pindex depends on the combination of the above */
597 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
598 case 0:
599 default:
600 pindex = 4;
601 break;
602 case ADM1275_VRANGE:
603 pindex = 5;
604 break;
605 case ADM1272_IRANGE:
606 pindex = 6;
607 break;
608 case ADM1275_VRANGE | ADM1272_IRANGE:
609 pindex = 7;
610 break;
611 }
612 tindex = 8;
613
614 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
615 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
616 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
617
618 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
619 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
620 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
621 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
622 ret = i2c_smbus_write_byte_data(client,
623 ADM1275_PMON_CONFIG,
624 config);
625 if (ret < 0) {
626 dev_err(&client->dev,
627 "Failed to enable VOUT monitoring\n");
628 return -ENODEV;
629 }
630 }
631 if (config & ADM1278_VIN_EN)
632 info->func[0] |= PMBUS_HAVE_VIN;
633 break;
634 case adm1275:
635 if (device_config & ADM1275_IOUT_WARN2_SELECT)
636 data->have_oc_fault = true;
637 else
638 data->have_uc_fault = true;
639 data->have_vout = true;
640
641 coefficients = adm1275_coefficients;
642 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
643 cindex = 2;
644
645 if (config & ADM1275_VIN_VOUT_SELECT)
646 info->func[0] |=
647 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
648 else
649 info->func[0] |=
650 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
651 break;
652 case adm1276:
653 if (device_config & ADM1275_IOUT_WARN2_SELECT)
654 data->have_oc_fault = true;
655 else
656 data->have_uc_fault = true;
657 data->have_vout = true;
658 data->have_pin_max = true;
659
660 coefficients = adm1276_coefficients;
661 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
662 cindex = 2;
663 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
664
665 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
666 | PMBUS_HAVE_STATUS_INPUT;
667 if (config & ADM1275_VIN_VOUT_SELECT)
668 info->func[0] |=
669 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
670 break;
671 case adm1278:
672 data->have_vout = true;
673 data->have_pin_max = true;
674 data->have_temp_max = true;
675 data->have_power_sampling = true;
676
677 coefficients = adm1278_coefficients;
678 vindex = 0;
679 cindex = 1;
680 pindex = 2;
681 tindex = 3;
682
683 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
684 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
685 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
686
687 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
688 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
689 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
690 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
691 ret = i2c_smbus_write_word_data(client,
692 ADM1275_PMON_CONFIG,
693 config);
694 if (ret < 0) {
695 dev_err(&client->dev,
696 "Failed to enable VOUT monitoring\n");
697 return -ENODEV;
698 }
699 }
700
701 if (config & ADM1278_VIN_EN)
702 info->func[0] |= PMBUS_HAVE_VIN;
703 break;
704 case adm1293:
705 case adm1294:
706 data->have_iout_min = true;
707 data->have_pin_min = true;
708 data->have_pin_max = true;
709 data->have_mfr_vaux_status = true;
710 data->have_power_sampling = true;
711
712 coefficients = adm1293_coefficients;
713
714 voindex = 0;
715 switch (config & ADM1293_VIN_SEL_MASK) {
716 case ADM1293_VIN_SEL_012: /* 1.2V */
717 vindex = 0;
718 break;
719 case ADM1293_VIN_SEL_074: /* 7.4V */
720 vindex = 1;
721 break;
722 case ADM1293_VIN_SEL_210: /* 21V */
723 vindex = 2;
724 break;
725 default: /* disabled */
726 break;
727 }
728
729 switch (config & ADM1293_IRANGE_MASK) {
730 case ADM1293_IRANGE_25:
731 cindex = 3;
732 break;
733 case ADM1293_IRANGE_50:
734 cindex = 4;
735 break;
736 case ADM1293_IRANGE_100:
737 cindex = 5;
738 break;
739 case ADM1293_IRANGE_200:
740 cindex = 6;
741 break;
742 }
743
744 if (vindex >= 0)
745 pindex = 7 + vindex * 4 + (cindex - 3);
746
747 if (config & ADM1293_VAUX_EN)
748 info->func[0] |=
749 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
750
751 info->func[0] |= PMBUS_HAVE_PIN |
752 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
753
754 break;
755 default:
756 dev_err(&client->dev, "Unsupported device\n");
757 return -ENODEV;
758 }
759
760 if (data->have_power_sampling &&
761 of_property_read_u32(client->dev.of_node,
762 "adi,power-sample-average", &avg) == 0) {
763 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
764 BIT(__fls(avg)) != avg) {
765 dev_err(&client->dev,
766 "Invalid number of power samples");
767 return -EINVAL;
768 }
769 ret = adm1275_write_pmon_config(data, client, true,
770 ilog2(avg));
771 if (ret < 0) {
772 dev_err(&client->dev,
773 "Setting power sample averaging failed with error %d",
774 ret);
775 return ret;
776 }
777 }
778
779 if (of_property_read_u32(client->dev.of_node,
780 "adi,volt-curr-sample-average", &avg) == 0) {
781 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
782 BIT(__fls(avg)) != avg) {
783 dev_err(&client->dev,
784 "Invalid number of voltage/current samples");
785 return -EINVAL;
786 }
787 ret = adm1275_write_pmon_config(data, client, false,
788 ilog2(avg));
789 if (ret < 0) {
790 dev_err(&client->dev,
791 "Setting voltage and current sample averaging failed with error %d",
792 ret);
793 return ret;
794 }
795 }
796
797 if (voindex < 0)
798 voindex = vindex;
799 if (vindex >= 0) {
800 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
801 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
802 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
803 }
804 if (voindex >= 0) {
805 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
806 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
807 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
808 }
809 if (cindex >= 0) {
810 /* Scale current with sense resistor value */
811 info->m[PSC_CURRENT_OUT] =
812 coefficients[cindex].m * shunt / 1000;
813 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
814 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
815 }
816 if (pindex >= 0) {
817 info->m[PSC_POWER] =
818 coefficients[pindex].m * shunt / 1000;
819 info->b[PSC_POWER] = coefficients[pindex].b;
820 info->R[PSC_POWER] = coefficients[pindex].R;
821 }
822 if (tindex >= 0) {
823 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
824 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
825 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
826 }
827
828 return pmbus_do_probe(client, info);
829 }
830
831 static struct i2c_driver adm1275_driver = {
832 .driver = {
833 .name = "adm1275",
834 },
835 .probe_new = adm1275_probe,
836 .id_table = adm1275_id,
837 };
838
839 module_i2c_driver(adm1275_driver);
840
841 MODULE_AUTHOR("Guenter Roeck");
842 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
843 MODULE_LICENSE("GPL");
844 MODULE_IMPORT_NS(PMBUS);
845